试样倾斜对球形压头微米划痕测试紫铜摩擦系数的影响

刘明; 黄承馨; 高诚辉

doi:10.3969/j.issn.1000-1158.2020.10.12

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计量学报 ›› 2020, Vol. 41 ›› Issue (10) : 1252-1259. DOI: 10.3969/j.issn.1000-1158.2020.10.12

力学计量

试样倾斜对球形压头微米划痕测试紫铜摩擦系数的影响

刘明,黄承馨,高诚辉

作者信息 +

Effect of Sample Tilt on Measurement of Friction Coefficient by Microscratch Test of Copper with a Spherical Indenter

LIU Ming,HUANG Cheng-xin,GAO Cheng-hui

Author information +

文章历史 +

摘要

采用球形压头对紫铜进行微米划痕实验,在恒定正压力下研究了试样倾斜对测试摩擦系数的影响。结果表明:实验测得的名义摩擦系数与倾斜角线性相关,且±9°的差别会造成摩擦系数相差约14倍。通过建立球形压头与试样倾斜状态的位置关系模型,发现试样倾斜对粘着摩擦系数无影响,而犁沟摩擦系数随倾斜角线性变化。为了准确计算无倾斜条件下的真实摩擦系数,可通过平面接触力学模型实现名义摩擦系数与真实摩擦系数之间的转换,或者在试样表面的不同位置往复划刻,再取摩擦系数的平均值作为最终结果。

Abstract

The microscratch test of copper was carried out by a spherical indenter, and the effect of sample tilt on the measurement of friction coefficient was studied under constant normal load. The results show that the nominal friction coefficient measured in the experiment is linearly related to the tilt angle, and the difference of ±9° will cause the friction coefficient to differ by about 14 times. By establishing the position relation model between the spherical indenter and the inclined state of the sample, it is found that the inclination of the sample has almost no effect on the adhesion friction coefficient, but the plowing friction coefficient changes linearly with the tilt angle. In order to accurately calculate the true friction coefficient under non-tilting condition, the conversion between the nominal friction coefficient and the true friction coefficient can be realized by the flat-on-flat type contact mechanics model. Another way is to reciprocate at different positions on the surface of the sample, and the average value is used as the final result.

导出引用

刘明,黄承馨,高诚辉. 试样倾斜对球形压头微米划痕测试紫铜摩擦系数的影响[J]. 计量学报. 2020, 41(10): 1252-1259 https://doi.org/10.3969/j.issn.1000-1158.2020.10.12

LIU Ming,HUANG Cheng-xin,GAO Cheng-hui. Effect of Sample Tilt on Measurement of Friction Coefficient by Microscratch Test of Copper with a Spherical Indenter[J]. Acta Metrologica Sinica. 2020, 41(10): 1252-1259 https://doi.org/10.3969/j.issn.1000-1158.2020.10.12

中图分类号： TB93

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